申请人:Pfizer Inc.
公开号:US04368331A1
公开(公告)日:1983-01-11
(2-methyl-3-hydroxy-4h-pyran-4-one is prepared by contacting 1(2-furyl)-1-ethanol in aqueous solution with two equivalents of a halogen oxidant at room temperature and then heating until the hydrolysis of the formed 4-halo-dihydro-pyran intermediate is substantially complete. Other valuable related gamma-pyrones are prepared in analogous manner from appropriate alcohols.
2-甲基-3-羟基-4H-吡喃-4-酮是通过将1(2-呋喃基)-1-乙醇在水溶液中与两当量的卤素氧化剂接触,并在室温下加热,直到形成的4-卤代-二氢吡喃中间体的水解基本完成而制备的。类似地,其他有价值的相关伽玛-吡喃可以从适当的醇类以类似的方式制备。